We're working on that. Cruzbit is still new, but there are a few of us assembling documentation and working through the user experience to make it more friendly. Keep in mind that the GPU code was just released less than a week ago, so it's still technically in "beta" phase. In time things will become a lot more simple to use.

I have begun assembling resources at http://cruzb.it, and added instructions for compiling the GPU miner yesterday. More documentation and tutorials will be available in the next few days.